Yes, I heard them. They were astonishingly good. I sat and listened through a decent section of Pink Floyd's The Wall, which was interesting because they played the same tracks at the show last year, but on the Epicon 6's. Obviously being 1 year apart, it wasn't the ideal A-B comparion ;-)
But nevertheless, they did sound to me just how I remembered the 6's sounding, with tight, crisp bass - though not quite as frightening as with the 6's! - and the same remarkable transparency and wide open sound stage. The kid's quoir singing "Hey teachers leave us kids alone" sounded like the kids were in the room, just incredible.
I rushed home and played the same track on my setup, which is currently Mac Mini feeding Benchmark DAC1-HDR and ICE Power 1000ASP amps made by Wyred4sound feeding Wilson Benesch Arc's. I am a big fan of Wilson Benesch, and this is my 3rd pair having previously owned Curves and some other Arcs.
I have to say I think the Helicon 2's murder my WB Arcs :-( The Arc's produce a remarkable open soundstage of their own, but the clarity of the Helicon's surpasses them I think. Also there seems more bass weight with the Dali's, which the specs would not imply. The Arcs go lower and louder according to both manufacturers' specifications, but this does not seem borne out in practice.
Suffice it to say, I am trying to work out how I can justify finding a spare £4,300 for the Helicon 2's plus stands. That said, my Arcs are very room-friendly with downward facing reflect ports. The Helicon's are rear-ported and I suspect will need a lot more space to avoid sounding boomy and I will have to audition them at home. I had to get rid of the Curves after a room change around because the bass was just too much, sadly.
My one regret is I didn't hang around to have a listen to the Fazon 5's. They look amazing and if they are anything like as good, would be an intriguing option.